It's my first power point.....

2. What's the difference between an Intel
Core i3, i5 and i7

3. Generally speaking, Core i7s are better than
Core i5s, which better than Core i3s.
Nope,
Core i7 does not have seven cores nor does
Core i3 have three cores. The numbers are
Simply indicative of their relative processing
powers.

4. Processing power
Processing power is the ability of a
computer to manipulate data.
Their relative levels of processing power
are based on
• Number of cores,
• Clockspeed (in GHz)
• Size of cache
• Intel technologies like Turbo Boost and
Hyper-Threading.

5. Number of cores
• A core can be thought of as in individual
processor.
• A dual-core processor, therefore has two
internal
processors, a quad-core model has four.
• All CPUs have one or more cores, with
each core being a processor itself.
• Most commonly an Intel Core processor

6. Number of cores
• More cores are useful for multi-tasking;
for example, you can run two applications
at the same time, each one having access
to its own dedicated processor.
• If you buy a Core i7 Extreme Edition, you
will find up to 12 physical cores. Physical
cores are better than virtual cores in
performance terms.
• The lowest number of cores can be found
in Core i3 CPUs, i.e., which have only

7. Number of cores
• Currently all Core i5 processors, except for the
i5-661, are quad cores. The Core i5-661 is
only a dual-core processor with a clockspeed
of 3.33 GHz.
• Remember that all Core i3s are also dual
cores. Furthermore, the i3-560 is also
3.33GHz, yet a lot cheaper. Sounds like it
might be a better buy than the i5. What gives?
• Even if the i5-661 normally runs at the
same clockspeed as Core i3-560, and

8. Clockspeed
• The CPU requires a fixed number
of clock ticks (or clock cycles) to execute
each instruction.
• The faster the clock, the more instructions
the CPU can execute per second.
• Clock speeds are expressed in megahertz
(MHz) or gigahertz ((GHz).
• One megahertz is equal to one million
cycles per scecond.
• Generally more clockspeed results in more
heat generation and more power

9. Cache size
• A processor's performance isn't determined by
clock speed alone, though. Other factors such
as cache memory size also play a part.
• Cache memory, also called CPU memory,
When a CPU finds it is using the same data
over and over, it stores that data in its cache.
• Cache is even faster than RAM, because it's
part of the processor itself.
• Here, bigger is better. Core i3 chips have 3- or
4MB, while i5s have 6MB and the Core i7s
have 8MB.
• This is clearly one reason why an i7
outperforms an i5 — and why an i5

10. Hyper-Threading
• A thread in computing terms is a sequence
of programmed instructions that the CPU
has to process.
• If a CPU has one core, it can process only
one thread at once, so can only do one thing
at once.
• Hence, a dual-core CPU can process two
threads at once, a quad-core four threads at
once. That's twice or four times the work in

11. Hyper-Threading
• A Core i3 with Hyper-Threading can process
two threads per core which means a total of
four threads can run simultaneously.
• The current Core i5 range doesn't have
Hyper-Threading so can also only process
four cores.
• i7 processors do have it, so can process
eight threads at once. Combine that with
8MB of cache and Turbo Boost Technology,

12. Intel Turbo Boost
• The Intel Turbo Boost Technology allows a
processor to dynamically increase its
clockspeed whenever the need arises.
• The maximum amount that Turbo Boost can
raise clockspeed at any given time is
dependent on the number of active cores, the
estimated current consumption, the estimated
power consumption, and the processor
temperature.
• Core i3 processors don't have Turbo Boost,